Synthesis, sintering and conductivity behavior of ceria-doped Scandia-stabilized zirconia

Hari Prasad Dasari, Jun Sung Ahn, Kiyong Ahn, Sun Young Park, Jongsup Hong, Hyoungchul Kim, Kyung Joong Yoon, Ji Won Son, Hae Weon Lee, Jong Ho Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

In this work, the effect of ceria addition on the phase formations, sinterability and electrical conductivity of 10 mol.% scandia stabilized zirconia (SSZ) is investigated. Ceria co-doped SSZ (SSZ-xCeO2 (x = 0.5, 1.0, 5.0 mol.%)) powders were successfully synthesized by glycine-nitrate process and the electrical conductivity was measured in the temperature range of 600-900 °C. Fourier-transform infrared spectroscopy (FT-IR) analysis showed that the samples sintered at 1300 °C/3 h are free from impurities such as un-decomposed nitrates, residual water and nitrile intermediates. From the X-ray diffraction (XRD) analysis, the sintered samples results revealed that the presence of cubic and rhombohedral β-phases and Raman spectroscopy analysis further revealed the presence and monoclinic and tetragonal phases. From the linear shrinkage spectra, a linear shrinkage of 27% was observed at 1300 °C for SSZ and was decreased with the increase of cerium oxide content. The electrical conductivity has been decreased with the increase of ceria content and the SSZ-0.5CeO2 sample displayed a higher electrical conductivity compared to others indicating that as small as 0.5 mol.% CeO2 doping in SSZ is enough to ensure good conductivity results for its potential application as an electrolyte material in intermediate-temperature solid oxide fuel cells (IT-SOFCs).

Original languageEnglish
Pages (from-to)103-109
Number of pages7
JournalSolid State Ionics
Volume263
DOIs
Publication statusPublished - 2014 Oct 1

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Scandium
scandium
Cerium compounds
zirconium oxides
Zirconia
sintering
Sintering
conductivity
synthesis
electrical resistivity
shrinkage
Nitrates
nitrates
cerium oxides
Nitriles
nitriles
Cerium
solid oxide fuel cells
glycine
Solid oxide fuel cells (SOFC)

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Dasari, Hari Prasad ; Ahn, Jun Sung ; Ahn, Kiyong ; Park, Sun Young ; Hong, Jongsup ; Kim, Hyoungchul ; Yoon, Kyung Joong ; Son, Ji Won ; Lee, Hae Weon ; Lee, Jong Ho. / Synthesis, sintering and conductivity behavior of ceria-doped Scandia-stabilized zirconia. In: Solid State Ionics. 2014 ; Vol. 263. pp. 103-109.
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Dasari, HP, Ahn, JS, Ahn, K, Park, SY, Hong, J, Kim, H, Yoon, KJ, Son, JW, Lee, HW & Lee, JH 2014, 'Synthesis, sintering and conductivity behavior of ceria-doped Scandia-stabilized zirconia', Solid State Ionics, vol. 263, pp. 103-109. https://doi.org/10.1016/j.ssi.2014.05.013

Synthesis, sintering and conductivity behavior of ceria-doped Scandia-stabilized zirconia. / Dasari, Hari Prasad; Ahn, Jun Sung; Ahn, Kiyong; Park, Sun Young; Hong, Jongsup; Kim, Hyoungchul; Yoon, Kyung Joong; Son, Ji Won; Lee, Hae Weon; Lee, Jong Ho.

In: Solid State Ionics, Vol. 263, 01.10.2014, p. 103-109.

Research output: Contribution to journalArticle

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T1 - Synthesis, sintering and conductivity behavior of ceria-doped Scandia-stabilized zirconia

AU - Dasari, Hari Prasad

AU - Ahn, Jun Sung

AU - Ahn, Kiyong

AU - Park, Sun Young

AU - Hong, Jongsup

AU - Kim, Hyoungchul

AU - Yoon, Kyung Joong

AU - Son, Ji Won

AU - Lee, Hae Weon

AU - Lee, Jong Ho

PY - 2014/10/1

Y1 - 2014/10/1

N2 - In this work, the effect of ceria addition on the phase formations, sinterability and electrical conductivity of 10 mol.% scandia stabilized zirconia (SSZ) is investigated. Ceria co-doped SSZ (SSZ-xCeO2 (x = 0.5, 1.0, 5.0 mol.%)) powders were successfully synthesized by glycine-nitrate process and the electrical conductivity was measured in the temperature range of 600-900 °C. Fourier-transform infrared spectroscopy (FT-IR) analysis showed that the samples sintered at 1300 °C/3 h are free from impurities such as un-decomposed nitrates, residual water and nitrile intermediates. From the X-ray diffraction (XRD) analysis, the sintered samples results revealed that the presence of cubic and rhombohedral β-phases and Raman spectroscopy analysis further revealed the presence and monoclinic and tetragonal phases. From the linear shrinkage spectra, a linear shrinkage of 27% was observed at 1300 °C for SSZ and was decreased with the increase of cerium oxide content. The electrical conductivity has been decreased with the increase of ceria content and the SSZ-0.5CeO2 sample displayed a higher electrical conductivity compared to others indicating that as small as 0.5 mol.% CeO2 doping in SSZ is enough to ensure good conductivity results for its potential application as an electrolyte material in intermediate-temperature solid oxide fuel cells (IT-SOFCs).

AB - In this work, the effect of ceria addition on the phase formations, sinterability and electrical conductivity of 10 mol.% scandia stabilized zirconia (SSZ) is investigated. Ceria co-doped SSZ (SSZ-xCeO2 (x = 0.5, 1.0, 5.0 mol.%)) powders were successfully synthesized by glycine-nitrate process and the electrical conductivity was measured in the temperature range of 600-900 °C. Fourier-transform infrared spectroscopy (FT-IR) analysis showed that the samples sintered at 1300 °C/3 h are free from impurities such as un-decomposed nitrates, residual water and nitrile intermediates. From the X-ray diffraction (XRD) analysis, the sintered samples results revealed that the presence of cubic and rhombohedral β-phases and Raman spectroscopy analysis further revealed the presence and monoclinic and tetragonal phases. From the linear shrinkage spectra, a linear shrinkage of 27% was observed at 1300 °C for SSZ and was decreased with the increase of cerium oxide content. The electrical conductivity has been decreased with the increase of ceria content and the SSZ-0.5CeO2 sample displayed a higher electrical conductivity compared to others indicating that as small as 0.5 mol.% CeO2 doping in SSZ is enough to ensure good conductivity results for its potential application as an electrolyte material in intermediate-temperature solid oxide fuel cells (IT-SOFCs).

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